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Type: Artigo de periódico
Title: Influence of aspect ratio and anisotropy distribution in ordered CoNi nanowire arrays
Author: Rosa, WO
Vivas, LG
Pirota, KR
Asenjo, A
Vazquez, M
Abstract: The size effects on magnetic properties of nanowires arrays were studied varying the nanowires diameter and maintaining the same periodicity among them, for two different nominal compositions of Co and Ni in the alloy form. The competition among magnetocrystalline and shape anisotropies changes drastically from smallest to biggest diameters altering the easy axis direction. In the case of 75% of Co in alloy, experimental values of the effective anisotropy constant (K-eff) vary from positive to negative depending on the diameter, which means a reversal of the easy axis direction. For 50% of Co the shape anisotropy dominates over the magnetocrystalline for all studied diameters. (c) 2012 Elsevier B.V. All rights reserved.
Subject: Magnetic nanostructure
Ordered nanowire array
CoNi alloy
Magnetization process
Anodic alumina membrane
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2012.05.047
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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